import React, { Component } from 'react'

// 所谓的逐层传递参数就是一层一层的往下传递

class First extends Component {
  render() {
    return (
      <div>
        First： {this.props.title}
        <Section con={this.props.title} />
      </div>
    )
  }
}

const Section = (props)=>{
  return (<>
    <div>
    Section: {props.con}
    </div>
  </>)
}


export default class App extends Component {
  render() {
    return (
      <div>
        <First title='卫龙'></First>
      </div>
    )
  }
}
